Using user's preferred language is confusing

As per code:

  // Use user's preferred language to build the url (e.g. reset language prefix to user's preferred language).
  // @todo Maybe this should be a configurable option.

This is very confusing. User installs multilink, creates a configuration and tries first links. Because his preferred language is probably different from the language of the node he is trying, he will get his language links instead of "expected" links. This took me 30 minutes to figure out.

Let's make it configurable. In filter settings, have configuration option:

Preferred language:
- Use users preferred language
- Use global languages

With a default to user's preferred language to keep backwards compatibility?